Examples herein relate to server systems with hinge mechanisms. In one example, a server system includes a first enclosure and a second enclosure, the first and second enclosure each include a front end and a back end disposed opposite to each other, the front end having an opening. The server system further includes a hinge mechanism, the hinge mechanism connecting an upper edge of the back end of the first enclosure to an upper edge of the front end of the second enclosure. The first enclosure is adapted to rotate around the hinge mechanism.